seriously, i have no idea though. I get this error on the second bleach game, but just didnt care about it enough to look it up lol.
the only thing i can think of it to make sure you backup your saves files, and to make sure you dont have a corrupt game/save.
did you trim the game? maybe the trimmer you used took to much data off.

Unfortunately I can't upgrade to a different flash card at the moment, otherwise I would not be using this one. Of course after I bought the R4 clone I found this site and found all the other options of flash cards available.

I didn't trim the rom, I usually don't unless I really need the room. Backing up is a good idea, which I didn't do of course. Live and learn.